def update(self,frame,recent_pupil_positions,events):
"""
gets called once every frame.
reference positon need to be published to shared_pos
if no reference was found, publish 0,0
"""
if self.active:
img = frame.img
if self.world_size is None:
self.world_size = img.shape[1],img.shape[0]
self.candidate_ellipses = get_canditate_ellipses(img,
area_threshold=self.area_threshold.value,
dist_threshold=self.dist_threshold.value,
min_ring_count=3,
visual_debug=self.show_edges.value)
if len(self.candidate_ellipses) > 0:
self.detected = True
marker_pos = self.candidate_ellipses[0][0]
self.pos = normalize(marker_pos,(img.shape[1],img.shape[0]),flip_y=True)
else:
self.detected = False
self.pos = None #indicate that no reference is detected
# center dark or white?
if self.detected:
second_ellipse = self.candidate_ellipses[1]
col_slice = int(second_ellipse[0][0]-second_ellipse[1][0]/2),int(second_ellipse[0][0]+second_ellipse[1][0]/2)
row_slice = int(second_ellipse[0][1]-second_ellipse[1][1]/2),int(second_ellipse[0][1]+second_ellipse[1][1]/2)
marker_roi = img[slice(*row_slice),slice(*col_slice)]
marker_gray = cv2.cvtColor(marker_roi,cv2.COLOR_BGR2GRAY)
avg = cv2.mean(marker_gray)[0]
center = marker_gray[second_ellipse[1][1]/2,second_ellipse[1][0]/2]
rel_shade = center-avg
#auto_stop logic
if rel_shade > 30:
#bright marker center found
self.auto_stop +=1
self.stop_marker_found = True
else:
self.auto_stop = 0
self.stop_marker_found = False
#tracking logic
if self.detected and not self.stop_marker_found:
# calculate smoothed manhattan velocity
smoother = 0.3
smooth_pos = np.array(self.smooth_pos)
pos = np.array(self.pos)
new_smooth_pos = smooth_pos + smoother*(pos-smooth_pos)
smooth_vel_vec = new_smooth_pos - smooth_pos
smooth_pos = new_smooth_pos
self.smooth_pos = list(smooth_pos)
#manhattan distance for velocity
new_vel = abs(smooth_vel_vec[0])+abs(smooth_vel_vec[1])
self.smooth_vel = self.smooth_vel + smoother*(new_vel-self.smooth_vel)
#distance to last sampled site
sample_ref_dist = smooth_pos-np.array(self.sample_site)
sample_ref_dist = abs(sample_ref_dist[0])+abs(sample_ref_dist[1])
# start counter if ref is resting in place and not at last sample site
if not self.counter:
if self.smooth_vel < 0.01 and sample_ref_dist > 0.1:
self.sample_site = self.smooth_pos
audio.beep()
logger.debug("Steady marker found. Starting to sample %s datapoints" %self.counter_max)
self.counter = self.counter_max
if self.counter:
if self.smooth_vel > 0.01:
audio.tink()
logger.debug("Marker moved to quickly: Aborted sample. Sampled %s datapoints. Looking for steady marker again."%(self.counter_max-self.counter))
self.counter = 0
else:
self.counter -= 1
ref = {}
ref["norm_pos"] = self.pos
ref["timestamp"] = frame.timestamp
self.ref_list.append(ref)
if self.counter == 0:
#last sample before counter done and moving on
audio.tink()
logger.debug("Sampled %s datapoints. Stopping to sample. Looking for steady marker again."%self.counter_max)
#always save pupil positions
for p_pt in recent_pupil_positions:
if p_pt['norm_pupil'] is not None:
self.pupil_list.append(p_pt)
#stop if autostop condition is satisfied:
if self.auto_stop >=self.auto_stop_max:
self.auto_stop = 0
self.stop()
else:
pass
def update(self,frame,recent_pupil_positions,events):
#get world image size for error fitting later.
if self.world_size is None:
self.world_size = frame.img.shape[1],frame.img.shape[0]
self.res.value = np.sqrt(self.world_size[0]**2+self.world_size[1]**2)
if self.window_should_close:
self.close_window()
if self.window_should_open:
self.open_window()
if self.active:
img = frame.img
#detect the marker
self.candidate_ellipses = get_canditate_ellipses(img,
area_threshold=self.area_threshold.value,
dist_threshold=self.dist_threshold.value,
min_ring_count=4,
visual_debug=self.show_edges.value)
if len(self.candidate_ellipses) > 0:
self.detected= True
marker_pos = self.candidate_ellipses[0][0]
self.pos = normalize(marker_pos,(img.shape[1],img.shape[0]),flip_y=True)
else:
self.detected = False
self.pos = None #indicate that no reference is detected
#only save a valid ref position if within sample window of calibraiton routine
on_position = 0 < self.screen_marker_state < self.screen_marker_max-50
if on_position and self.detected:
ref = {}
ref["norm_pos"] = self.pos
ref["timestamp"] = frame.timestamp
ref['site'] = self.active_site
self.ref_list.append(ref)
#always save pupil positions
for p_pt in recent_pupil_positions:
if p_pt['norm_gaze'] is not None:
self.gaze_list.append(p_pt)
# Animate the screen marker
if self.screen_marker_state < self.screen_marker_max:
if self.detected or not on_position:
self.screen_marker_state += 1
else:
self.screen_marker_state = 0
self.active_site += 1
logger.debug("Moving screen marker to site no %s"%self.active_site)
if self.active_site == len(self.sites)-2:
self.stop()
return
# function to smoothly interpolate between points input:(0-screen_marker_max) output: (0-1)
m, s = self.screen_marker_max, self.screen_marker_state
interpolation_weight = np.tanh(((s-2/3.*m)*4.)/(1/3.*m))*(-.5)+.5
#use np.arrays for per element wise math
current = np.array(self.sites[self.active_site])
next = np.array(self.sites[self.active_site+1])
# weighted sum to interpolate between current and next
new_pos = current * interpolation_weight + next * (1-interpolation_weight)
#broadcast next commanded marker postion of screen
self.display_pos = list(new_pos)
self.on_position = on_position
def update(self,frame,recent_pupil_positions,events):
if self.window_should_close:
self.close_window()
if self.window_should_open:
self.open_window()
if self.active:
img = frame.img
#get world image size for error fitting later.
if self.world_size is None:
self.world_size = img.shape[1],img.shape[0]
#detect the marker
self.candidate_ellipses = get_canditate_ellipses(img,
area_threshold=self.area_threshold.value,
dist_threshold=self.dist_threshold.value,
min_ring_count=4,
visual_debug=self.show_edges.value)
if len(self.candidate_ellipses) > 0:
self.detected= True
marker_pos = self.candidate_ellipses[0][0]
self.pos = normalize(marker_pos,(img.shape[1],img.shape[0]),flip_y=True)
else:
self.detected = False
self.pos = None #indicate that no reference is detected
#only save a valid ref position if within sample window of calibraiton routine
on_position = 0 < self.screen_marker_state < self.screen_marker_max-50
if on_position and self.detected:
ref = {}
ref["norm_pos"] = self.pos
ref["timestamp"] = frame.timestamp
self.ref_list.append(ref)
#always save pupil positions
for p_pt in recent_pupil_positions:
if p_pt['norm_pupil'] is not None:
self.pupil_list.append(p_pt)
# Animate the screen marker
if self.screen_marker_state < self.screen_marker_max:
if self.detected or not on_position:
self.screen_marker_state += 1
else:
self.screen_marker_state = 0
self.active_site += 1
logger.debug("Moving screen marker to site no %s"%self.active_site)
if self.active_site == 10:
self.stop()
return
# function to smoothly interpolate between points input:(0-screen_marker_max) output: (0-1)
m, s = self.screen_marker_max, self.screen_marker_state
interpolation_weight = np.tanh(((s-2/3.*m)*4.)/(1/3.*m))*(-.5)+.5
#use np.arrays for per element wise math
current = np.array(self.sites[self.active_site])
next = np.array(self.sites[self.active_site+1])
# weighted sum to interpolate between current and next
new_pos = current * interpolation_weight + next * (1-interpolation_weight)
#broadcast next commanded marker postion of screen
self.display_pos = list(new_pos)
self.on_position = on_position
def update(self, frame, recent_pupil_positions, events):
"""
gets called once every frame.
reference positon need to be published to shared_pos
if no reference was found, publish 0,0
"""
if self.active:
img = frame.img
if self.world_size is None:
self.world_size = img.shape[1], img.shape[0]
self.candidate_ellipses = get_canditate_ellipses(
img,
area_threshold=self.area_threshold.value,
dist_threshold=self.dist_threshold.value,
min_ring_count=5,
visual_debug=self.show_edges.value)
if len(self.candidate_ellipses) > 0:
self.detected = True
marker_pos = self.candidate_ellipses[0][0]
self.pos = normalize(marker_pos, (img.shape[1], img.shape[0]),
flip_y=True)
else:
self.detected = False
self.pos = None #indicate that no reference is detected
# center dark or white?
if self.detected:
second_ellipse = self.candidate_ellipses[1]
col_slice = int(second_ellipse[0][0] - second_ellipse[1][0] /
2), int(second_ellipse[0][0] +
second_ellipse[1][0] / 2)
row_slice = int(second_ellipse[0][1] - second_ellipse[1][1] /
2), int(second_ellipse[0][1] +
second_ellipse[1][1] / 2)
marker_roi = img[slice(*row_slice), slice(*col_slice)]
marker_gray = cv2.cvtColor(marker_roi, cv2.COLOR_BGR2GRAY)
avg = cv2.mean(marker_gray)[0]
center = marker_gray[second_ellipse[1][1] / 2,
second_ellipse[1][0] / 2]
rel_shade = center - avg
#auto_stop logic
if rel_shade > 30:
#bright marker center found
self.auto_stop += 1
self.stop_marker_found = True
else:
self.auto_stop = 0
self.stop_marker_found = False
#tracking logic
if self.detected and not self.stop_marker_found:
# calculate smoothed manhattan velocity
smoother = 0.3
smooth_pos = np.array(self.smooth_pos)
pos = np.array(self.pos)
new_smooth_pos = smooth_pos + smoother * (pos - smooth_pos)
smooth_vel_vec = new_smooth_pos - smooth_pos
smooth_pos = new_smooth_pos
self.smooth_pos = list(smooth_pos)
#manhattan distance for velocity
new_vel = abs(smooth_vel_vec[0]) + abs(smooth_vel_vec[1])
self.smooth_vel = self.smooth_vel + smoother * (
new_vel - self.smooth_vel)
#distance to last sampled site
sample_ref_dist = smooth_pos - np.array(self.sample_site)
sample_ref_dist = abs(sample_ref_dist[0]) + abs(
sample_ref_dist[1])
# start counter if ref is resting in place and not at last sample site
if not self.counter:
if self.smooth_vel < 0.01 and sample_ref_dist > 0.1:
self.sample_site = self.smooth_pos
audio.beep()
logger.debug(
"Steady marker found. Starting to sample %s datapoints"
% self.counter_max)
self.counter = self.counter_max
if self.counter:
if self.smooth_vel > 0.01:
audio.tink()
logger.debug(
"Marker moved to quickly: Aborted sample. Sampled %s datapoints. Looking for steady marker again."
% (self.counter_max - self.counter))
self.counter = 0
else:
self.counter -= 1
ref = {}
ref["norm_pos"] = self.pos
ref["timestamp"] = frame.timestamp
self.ref_list.append(ref)
if self.counter == 0:
#last sample before counter done and moving on
audio.tink()
logger.debug(
"Sampled %s datapoints. Stopping to sample. Looking for steady marker again."
% self.counter_max)
#always save pupil positions
for p_pt in recent_pupil_positions:
if p_pt['norm_pupil'] is not None:
self.pupil_list.append(p_pt)
#stop if autostop condition is satisfied:
if self.auto_stop >= self.auto_stop_max:
self.auto_stop = 0
self.stop()
else:
pass
